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' J. A. MILLJKEN GLASS CUTTING MACHINE Feb. 15, 1927. v v Re. 16,550

Original Filed Aug. 21-. 1916 s s eets-shear. 1

a g E 7' INVENTOR. I a. :4 (5251 ATTORNEY.

J. A. MILLIKEN GLASS CUTTING IACHINB Feb. 15,1921. I Re; 16,550

Original Filed Aug. 21, 1916 8 Shouts-Sheet 2 IN VE N TOR.

* ATTORNEY.

192 Ra. 16,550 r 7 J. A. MILLIKEN cuss cu'r'rme ncmim Original FiledAug. 21, 191 a shuts-shoot a IN VENTQR.

2 ATTORNEY.

Feb. 15,1927. R.,16,550

. J. A. M|LL|KEN cuss cur'rme MACHINE Original Filed Aug. 21, 1916 8Shee tS-Sheet t v INVENTOR.

- M 24- Gm 4 ATTORNEY.

' Re. 16,550 1927' J. A. MILLIKEN GLASS CUTTING MACHINE Original FiledAug. 21, 1916 8 Sheets-Shefl 5 IN VEN TOR.

II/I/I il m 7///////// I BY A {M J 24 C372; ATTORNEY Feb. 15, 1927. Re.16,550

J.-A. MILLIKEN GLASS CUTTING IACHINB Original Filed Aug. 21, 1916 8Shaets-Sheet 6 K2 ATTORNEY.

Feb. 15, 1927. Re. 16,550

J. A. MILLIKEN GLASS CUTTING MAGHINE Original Filed Aug. 21, 1916 8Sheets-sheaf 7 IN VEN TOR.

4 ATTORNEY.

8 Sheets-Sheet 8 INVENTOR.

LL AIM BY @p wf ATTORNEY.

J. A. MILLIKEN GLASS CUTTING MACHINE Original Filed Aug. 21, 1916 Feb.15, 1927.

Reissued Feb. 15, 1927.

UNITED STATES PATENT OFFICE.

JOHN A. MILLIKEN, or AMBLER, PENNSYLVANIA, ASSIGNOR TO JOHN E. MARSDEN,0F ATLANTIC CITY, NEW JERSEY.

GLASS-CUTTING MACHINE.

Original application filed August 21, 1916, Serial No. 116,170. RenewedMarch 25,. 1921, Serial No.

455,593. Original No. 1,402,457, dated January 3, 1922. Application forreissue filed August 21,

1923. Serial-No. 658,652.

This invention is a machine for cutting or grinding ornamental designsinto the surfacesof glass articles, such as tumblers and the like.

One of the objects of the invention is to provide a machine of thischaracter for au" tomatically applying a design to the surface of thearticle being acted upon. A further object is to provide meansforautomatically imparting a step by step rotation to the glass article,and for automatically applying a portion of the design during the pausesin the rotation thereof. A further object'is to provide an automaticmachine for ornament ing the surfaces of glass. articles, said machinehaving means by which the design may be varied. A further object is toprovide a machine of this character having means for controlling thecutting mechanism to automaticallycompensate for inequalities in thesurface of the glass articles. A further object is to provide means toengage the glass article and mechanism controlled thereby, to insure auniform depth of out by the cutting mechanism. A further object is toprovide means by which the depth of cut may be varied. A further objectis to provide means whereby the machine will automatically adjust itselfto glass bodies of different diameters, without previous manualmanipulation. A further object is to provide means whereby the machinewill be automatically stopped atthe completion of the design thatisbeing impartedto the article being operated upon.

The invention will be hereinafter fully set forth and particularlypointed out in the claims.

In the accompanying drawings Fig. 1 is a side elevation of a machineconstructed in accordance with the invention. Fig. 2 is a front viewthereof. Fig. 2 is a detail view of the yieldable abutment. Fig. 3 is arear view of the machine. Fig. 4 is a sectional side elevation, one ofthe sides of the machine frame being removed. Fig. 5 is a detail view ofthe chuck-rotating and the throw-off mechanisms. Fig. 6 is a detail viewillustrating the means for preventing rotation of the chuck. Figs. 7, 8,9 and 10 are detail views of the feeler slide and grinder slides andtheir adjuncts. Fig. 11 is a longitudinal sectional view of the chuckand chuck shaft. Fig. 12 is a front end view of the chuck. Fig. 13 is adetail view of the operating cam. Figs. 14 to 17, are diagram maticviews illustrating the method of cutting and various designs producedthereby.

Referring to the drawings,-10 designates a base plate, attached to andsupported by a suitable bench or standard (not shown). Secured to saidbase plate 10, are the sides 11, of the frame, said sides being rigidlyretained in spaced relation, by pairs of cross bars. The lowercross-bars 12 rest upon ribs 13, formed on the inner faces of saidsides, said cross bars being held in position in suitable manner. Theupper cross bars 15, have their ends in engagement with the inner facesof the sides 11, said bars 15 being arranged in different planes.

The main drive shaft 16, is mounted in a sleeve-like bearing 17',extending transversely through one of the sides 11, a portion of saidsnaft being provided with a worm 18. Power may be applied to the shaftin any suitable or preferred manner. In the drawings, a pulley 19, isillustrated as loosely mounted upon said shaft, said pulley receivingits power from a source, not shown. Any desired form of clutch may beemployed for coupling the pulley 19, with the driveshaft. As shown inthe drawings, the shaft is provided with a clutch member 20, rigidlysecure thereto, complemental to a corresponding clutch member on oneface of the pulley 19, a spring 21, encircling the shaft 16 actingagainst said pulley to normally separate the clutch members. For thepurpose of moving the pulley against the tension of spring 21, to efiectengagement of the clutch members, a lever 22 is provided, the same beingattached to a hub 23, rotatably mounted upon the shaft 16, one end ofsaid hub being positioned to abut against the hub of the pulley 19, theother end of the hub 23 being provided with a projection 24, shaped toenter a cam recess 25, formed in the contiguous end of the bearingsleeve 17. The spring 21, acts against the lever 22, to maintain theprojection 24, opposite the recess 25, thereby permitting the spring 21to move the pulley 19, in a direction to disengage the clutch. Mount-edin suitable bearings with which the cross-bars 12 are provided, is a camshaft 27, the same being provided with a worm wheel 28, meshing with theWorm 18 on the main drive shaft.

The cross bars 15 are provided with bearings which rotatably support anormally inclined chuck-shaft 30, provided with a ratchet wheel 31,which is engaged by a pawl 32, pivotally mounted upon a pawl carrier 33,slidably mounted upon a guide 34, secured in suitable manner to one ofthe cross-bars 15. The pawl carrier 33, is reciprocated by means of anarm 35, to which it is pivotally connected, said arm being attached to arock shaft 36, having its ends mounted in suitable bearings carried bythe sides 11, said rock shaft being provided with an actuating finger37, overhanging a cam member C secured to the cam shaft 27. Said cammember is provided with a plurality of raised peripheral cam portions38, positioned to engage the finger 37, and thereby rock the shaft 36,so as to actuate the pawl member, whereby the chuck shaft received apartial forward rotation. The chuck shaft 30, is slidable longitudinallyin its bearings, movement being imparted thereto by means of a bellcrank lever 39, one arm of which is provided with a fork 39 engagingshoulder 40 formed on said shaft, the other arm of said bell crank leverbeing connected with a treadle 41. A spring 42, or other suitabledevice, is employed to press said chuck shaft upwardly against a spacingbar 43, supported in a suitable carrier 44, attached to one of the bars15, said spacing bar being positioned to engage an annular flangeattached to the shaft 30, to limit longitudinal movement of said shaftin one direction, for a purpose to be hereinafter described. In order tolock the chuck shaft after each partial forward rotation thereof, underthe action of pawl 32, a locking wheel 46 is rigidly secured thereto,the periphery of said wheel being provided with V-shaped notches 47corresponding in number with the teeth upon ratchet wheel 31. Saidnotches are engaged by a locking member 48, provided with a projectioncomplemental thereto, said locking member being pivotally supported by aprojection 49, attached to one of the cross bars 15, a spring 50 actingto maintain said locking member normally in engagement with theperiphery of the locking wheel.

The spacing bar 43 is provided with one or more shoulders 51,corresponding to the number of times the glass is to be completelyrotated while the design isbeing applied thereto, said shoulders beingpositioned to be engaged by the flange 45. Attached to said flange 45 isa cam 52, which as the flange 45 completes each revolution, engages oneof the shoulders of the spacing bar. and moves said bar upwardly asufficient distance to bring the next shoulder into position opposite tosaid flange 45, the spring 42, on the treadle 41, serving to move thechuck shaft longitu dinally to bring said collar into engagement withthe said next shoulder.

Any desired form of chuck for engaging and holding the glasses to beoperated upon, may be employed. In the form of chuck illustrated, thechuck shaft 30 is made hollow and extending longitudinally through thesame is a draw-bar 53, provided at its lower end with a collar 54,slidably mounted upon the chuck shaft, and held in engagement with thefork 39, of the bell crank lever 39, by means of a spring 55, actingbetween abutments upon said draw bar and said chuck shaft respectively.Rigidly secured to the upper end of the chuck shaft 30, are hubs 56 and56 provided with pivoted fingers 57. which support glass engaging bars58, of approximate U-shape in cross section, an elastic band 59encircling the bars 58 acting to maintain them normally undercompression and in contracted relation. Each finger 57 is provided witha rearwardly extended projection 60. The chuck shaft 30 islongitudinally slotted adjacent the hubs 56 and 56. to accommodate pins61 and 61, at tached to the draw bar 53. The pin 61 prd jects through aslotted portion 62, formed in a slidable hub 63, said hub being providedwith a flange 64, normally held against the projection 60, of thecontiguous fingers 57, by means of springs 65, encircling bolts, orsimilar devices 66, attached to said collar, and extended through lugsprojecting from the hub 56. The pin 61 rigidly connects a hub 63 withthe draw-bar 53, said hub 67 being provided with a flange 64, positionedto engage the projections of the fingers 57 carried by the hub 56. Bymeans of this arrangement the flanges 64 and 64, acting against theprojections 60, of the fingers 57 hold the bars 58, outwardly intoengagement with the inner surface of the glass to be acted upon, andagainst the tension of the elastic band 59, until the treadle41 ispushed downwardly, drawing the draw bar downwardly, with the result thatthe hub 63 is positively moved at once with the draw bar, permitting thefingers 5'? carried by the hub 56, to move inwardly under the tension ofthe band 59, and the draw bar 53 continues to move, the pin 61 willtraverse the length of the slot 62, and then withdraw the hub 63 fromengagement with the fingers 57 carried by the hub 56 whereupon a glassupon. the chuck may be removed and a new one substituted. Thearrangement above described permits of the ready and prompt placing ofthe glass into, and removing it from position to be acted upon by thegrinding devices to be hereinafter described, and at the same timeinsures that the glass will be firmly engaged-at all points by a uniformlUI) llU

pressure of sufficient force to retainthe same in position and insureits rotation with the chuck during the operations of the machine.

In the drawings two grinding mechanisms A and B are disclosed, althougheither may be dispensed with without departing from the spirit; of theinvention. For most purposes, however, for which the invention isdesigned, twosuch mechanisms are desirable the same being actuated bycams C and C secured to cam shaft 27. Inasmuch as each of the mechanismsis a. duplicate of the other, the description of one will sufiice. Eachof said grinding members comprises a drive shaft 68 mounted in front andback slides 69 and 70, movably supported in housings 71 and 7 2, locatedat the front and back of the frame, respectively. Said housings areadjust-ably mounted upon guides 73, carried by the contiguous side 11 ofthe frame, being connected by a top-plate 74, whereby both housings maybe simultaneously moved to adjust the shaft 68, forwardly or backwardly,as may be desired. The

- slides 69 and 70 are provided with anti-friction bearings of anysuitable or desired form, capable of rotatably supporting said shaft.The housings 71 and 7 2 are provided with longitudinally extended slots7 3 to provide clearance for the lateral movement of the shaft when theslides 69 and 70 are actuated- A rock shaft 75 is supported by bearings7 5, carried by the sides 11, and secured to said rock shaft are arms 76and 77, which arms are provided with bearings 78, to support second rockshaft 79, provided at its ends with crank members 80, engaging blocks 81mounted in vertical guides 82, in the respective slides 69 and 70.Loosely mounted on the rock shaft 75 is one member 83, of a. frictiondevice, the other member 84 of which is connected with the arm 76. Themember 83 of the friction device is secured to an arm 86 which engages acam groove 87 in one face of the cam member C or C, as the case may be.The shaft 68 is rotated in suitable manner, belt pulleys 68 for thatpurpose being illustrated in the drawings.

The front face of the housing 71 is provided'with a guide for a feelerslide 88, provided with a projection 89 adapted to en gage the glassbeing operated upon, for the purpose of controlling the movement of theslides 69 and 70, said slide 88 having a slot 90 to provide clearancefor the shaft 68.

The inner face of the feeler slide 88, is provided with a pin or lug 91which projects.

into a recess 92, in the slide 69, the movement of the lug'91 relativeto the slide 69 being adjustably limited by means of a screw 93, carriedby the said slide 69, and supported opposite the pin or lug 91.. \Vhen aglass is to be placed upon the chuck, the rock shaft 79 is manuallyactuated by means of the finger 94,'so as to move-the slides 69 and 7.0,and the feele-r slide 88, away-from the chuck. \Vhen the glass has beenplaced in position, movement of the rock shaft 79 is reversed until theprojection 89, comes into contact with the glass, whereupon movement ofall the slides is arrested. In order to temporarily lock the feelerslide 88, during the period that the chuck is not rotating, the housing71 is provided with. a guide to receive a locking member 96 looselymounted upon an eccentric 97 provided with an operating arm 98,connected bya link 99, with an actuating member 100, pivotally supportedin an arm 101 carried by one of the cross bars 12, and said actuatingmember being operativelyconnected with the cam C. In operation after thefeeler slide has been moved into engagement with the glass, the arms 76and 77 areactuated to move the slides 71 and 72, to ward the chuck tobring the grinding wheels A and B into contact with the glass, thecontacting movement of each wheel being arrested when the screw 93 comesinto contact with the pin or lug 91, movement of the feeler slide beingprevented by the locking member 96. It will thus be observed that thefeeler slide serves as a. gage to control the movement of its respectivegrinding wheel with respect to the tumbler. In order to prevent shaft 79from rocking too freely a tension device is provided, such as the weight94 Movement of the feeler slide 88 away from the chuck is adjustablylimited by a threaded rod 88 mounted in slide 88 and positioned toengage a stop 8S carried by slide 69. v

In order to compensate for inequalities'in the diameter of the glassbeing acted upon so as to insure uniformity in the operation of thegrinding mechanism, the arm 76 is provided with an extension 103provided at its extremity with a hub 104, carrying a sleeve 105, throughwhich extends a pin 106. Said pin is encircled by a helical spring 107,one end of which acts against an abutment in the sleeve. and the otherend acts against a collar 108 attached to the pin. Movement ofthe pinunder the action of the spring is limited by the nut 109, movementflange 110 onthecollar 108', positioned to abut against the end of'thesleeve. Mounted in suitable bearings carriedby the sides 11, is a rockshaft 111, provided with an actuating member 112, positioned to engagecam projections 113 on the cam member C. Loosely mounted on said rockshaft is a member 114, provided with a wedge-shaped portion 115,positioned to move between the inner end of the pin 106, and a pin orlug 'in the other direction being limited by a p 116 projecting from theside 11, said memher 114, resting by gravity against a pin orlug- 117,carried by an arm 118 rigid-1y secured to said rock shaft.

In operation, while the slides 69 and 70 are moving toward the glass tobe operated upon, the arm 103 moves away from the side member 11,permitting the spring 107 to project pin 106 toward said side member, tomove collar 110 away from the end of sleeve 105. At the same time thewedge portion 115 of member 114 is moving by gravity between pin 106 andlug 117. Just as soon as movement of the slides is arrested, themovement of wedge member 115 is also arrested, for the reason thatthegravity cannot overcome the friction of the engagement with pin 106. Thedistance between collar 110 and the end of sleeve 105 at this timecorresponds to the distance the slides 69 and 70 have moved toward theglass. As said slides move away from the glass, the extension 103 isfirst moved the distance between collar 110 and the end of sleeve 105,whereupon the wedge 115, which fills the space between pin 106 and lug116, acts as a solid abutment, cooperating with collar 110 to preventfurther movement of said extension 103, and therefore also limiting thewithdrawal movement of the slides, but the cam arm is permitted tocontinue to move, by the friction device. By this arrangement eachgrinding wheel is moved just far enough to clear the glass and permitthe latter to be rotated, the grinding mechanism being thenautomatically held in a neutral position until the peak of the cam inmember C or C, as the case may be, comes around into engagement with thecam arm 86 to repeat the operation of the machine. This operation willbe more clearly understood by reference to Fig. 13, in which the cam arm86 is shown as having just reached the peak of the cam. In travelling tothis position, when the roller reaches the point 0, the feele-r slide 88is unlocked, and the grinding wheel starts to withdraw, the withdrawalbeing completed when the point '2) is reached. The roller must thentravel from o to the peak of the cam, as indicated at a, furthermovement of the grinding wheel being prevented by the member 114 untilthe roller reaches the peak of the cam at which point the cam 113engages actuating member 112, and actua-tes rock shaft 111 to withdrawmember 114:, whereupon the operations of the machine are repeated. Thusit will be understood that the feeler slide 88. serves as a gage toautomatically adjust the parts to compensate for irregularities in thesurface of the glass being acted upon, and also to automaticallycompensate for lasses of different sizes.

In or er to provide for the automatic stopping of the machine at thecompletion of the cutting operation, suitable throw off mechanism isprovided. Said mechanism is illustrated as comprising a latch 120,slidably mounted in a boss attached to one of the sides 11, and normallyheld in the path of the clutch lever 22, by a spring 121. Said latch isshifted against the tension of the spring, by means of a lever 123,connected at one end to the latch, and pivotally supported in suitablemanner, said lever having an extension by means of which it may bemanually operated if desired. Adjustably attached to the chuck shaft 30is a throw oif pawl 126, movable with the chuck shaft when the latter isshifted longitudinally. At the end of the last revolution of the chuckshaft, i. e.,that revolution which takes place while the flange 45 is inengagement with the last notch of the spacing bar 43, the throw-off pawlwill have been moved into a position opposite the lever 123, and willengage a cam portion127 on said lever, shifting the latter in adirection to withdraw the latch 120 from engagement with the clutchlever 22, permitting the pulley 19 to be automatically unclutched fromthe drive shaft.

In operation, the operator first presses down upon the treadle 11,thereby shifting the draw-bar 53, so as to contract the chuck, whereuponthe glass may be placed over the chuck as shown at G in the drawing.Upon releasing the treadle, the chuck members will accurately anduniformly engage the glass with suflicient force to insure that theglass will rotate with the chuck. Both shafts 79 are rocked toward theglass by the fingers 94, thereby bringing the feeler' slides 88 intoengagement with the glass, and moving the grinding wheels also intoengagement with the glass. The clutch lever 22 is then shifted to permitthe pulley 19 to be clutched with the drive shaft 16, whereupon the camshaft 27 is set in motion, the clutch lever being engaged by latch 102.As soon as the camshaft starts to revolve, the actuating member 100 isoperated to bring the locking blocks 96 into engagement with the feelerslides 88 to temporarily lock the latter rigidly against movement. Justas soon as the feeler slides 88 are locked, the cams C and C rock thearms 86 to actuate the rock shafts 74 and 79, to carry the grindingwheels A and B into engagement with 013- posite sides of the glass, thefeeding movement of the said grinding wheels being limited by theengagement of the adjustable abutments 93. engaging the pins 91, carriedby the feeler slides 88. As soon as movement of the slides is arrestedby the abut-- ments 93, the cutting or grinding action of the grindingwheels A and B ceases, further movement of the cam arms 86, however,being permitted by the friction devices, in order to allow the came torotate to the points at which the withdrawal of the cutting devices isto commence. Simultaneously with the feeding movement of the grindingwheels A and B, the rock shaft 111,

has been operated to permit the members 114 to drop between the pins 106and the lugs 116, the distance between collar 110 and the end of thesleeve 105 corresponding to the distance the slides have travelledtoward the glass. \Vhen the cams C and C have rotated to the point thatthe cam arms 86 are moved to withdraw the cutters, the member 100 isactuated to disengage the locking blocks 96 from the feeler slides 88,and the reverse movement of the rock shafts 74 moves the grinding wheelsA and B away from the glass, a sufficient distance to permit the latterto be rotated with the chuck. By reason of the engagement between thepins 106, lugs 116 and the members 114, rigid abut-ments are providedwhich prevent the slides from'movi'ng back a distance greater than thatrequired to permit of rotation of theglass, the friction devicespermitting the cam members 86 to move until the Peaks of the cams C andC come'around into engagement therewith. Just as soon as the slides aremoved to disengage the cutters from the glass, the cam member C actuatesthe pawl carrier 33, so as to rotate the chuck shaft a predetermineddistance. At the time that this rotation of the chuck shaft iscompleted, the peaks of the respective cam grooves in cams C and C havereach-ed the cam arms 86, and the slides 69 and 70, and the feelerslides 88, are again moved toward the glass until the feeler slidesengage the glass, when they are again locked, and the cutters brought upinto engagement with the glass,

in the manner before described, the feeding movement being limited byengagement with the feeler slide, as before described. These automaticoperations of feeding up to and away from the glass, and the periodicrotation of the chuck shaft, continue until the chuck has completed anumber of revolutions corresponding to the number of should-ers 51, onthe spacer bar 43, the chuck bein moved longitudinally step by step atthe end of each complete rotation of the chuck shaft. As the rotation ofthe chuck shaft in engagement with the last shoulder of the spacing baris completed, the throw-off pawl 126 has been moved to a positionopposite the throw-off lever 123, whereupon the latch 120 is withdrawnfrom engagement with the clutch lever 22, and the pulley 19 isautomatically unclutched from the drive shaft. treadle 41 is thendepressed to contract the chuck, whereupon the glass may be withdrawn. 7

It will be understood that while the grinding mechanisms A and B, areillustrated and described as mounted on horizontal shafts, with aninclined chuck shaft between them, it is obvious that the chuck shaftmay be mounted horizontally and the other shaftsin' parallel relation,inclined with respect to the chuck Si'flfi without departing from theThe I spirit 'of the invention; This angular relation of the. grindersand of the chuck shaft possesses an important advantage. It will bereadily seen that the grinders of the respective mechanism A and B makecut-s in the glass at an angle to each other, which angle will vary withthe relative angle of the chuck and the axes of the grinders. \Vhen thecutters are adjusted so that they engage the glass in line with a pointcorresponding to the intersection of the axis of the chuck shaft, withthe axes of the grinders the cuts madeby the cutters will intersect eachother at the middle, as shown at D in Fig. 14. By adjusting themechanism A backwardly, and the mechanism B forwardly in equal distance,the cuts may be made to intersect at various .points or even to beslightly separated as indicated at E, Figs. 15 and 17, and by reversingthis adjustment the cuts will have the reverse appearance as indicatedat F in said Fig. 16. l

Having thus explained the nature of the invention, and described anoperative mannor, of constructing and using the same, al thoughWithoutattempting to set fort-h all of the forms in which it may bemace, or all of the forms of its use, the following is claimed.

What I claim is: 1

1. In a glass cutting mechanism of the character described comprising achuck, a grinder, means for alternately moving the grinder into and outof engagement with an article to be operated upon, and a feeler mem berreciprocated to and from said article by corresponding movements of saidgrinder.

2. A glass cutting mechanism of the character described comprising achuck, a grinder, means for alternately moving the grinder into and outof engagement with an article to be operated upon, a feeler memberreciprocated to and from said article by corresponding movements of saidgrinder, and means cooperating with the grinder moving means by whichthe engaging movements of the grinder and feeler member may be variablyarrested to conform to inequalities in the surface contour of thearticle.

3. A glass cutting mechanism of the character described comprising achuck, a grinder, means for alternately moving the grinder into and outof engagement with an article .to be operated upon, a feeler memberreciprocated to and from said article by corresponding movements of saidgrinder, and means for locking the feeler member after it has been movedinto engagement with the article.

4. An improvement in glass cutting mechanism comprising-a chuck, agrinder, means for moving the grinder into and out of engagement with anarticle carried said chuck, a feeler slide for contacting with anarticle ca ried by said chuck, whereby said slide may be variablypositioned in ac cordance with the size of the article, a locking block,means for automatically actuating said block to cause the same toperiodically engage said slide, and means whereby movement of thegrinder toward said chuck is limited by said slide.

5. A glass cutting mechanism of the character described comprising achuck, a grinder, means for alternately moving the grinder into and outof engagement with an article to be operated upon, a feeler memberreciprocated to and from said article by corresponding movements of saidgrinder, means cooperating with the grinder moving means by which theengaging movements of the grinder and feeler member may be variablyarrested to conform to inequalities in the surface contour of thearticle, whereby a uniform depth of cut is maintained irrespective ofthe surface inequalities, and means for adjustably varying the depth ofthe cut.

An improvement in glass cutting mechanism comprising a chuck, a grinder,means for moving the grinder into and out of engagement with an articlecarried by the chuck, a feeler slide movable relative to the chuck andpositioned to contact with an article carried by said chuck, saidgrinder and said slide being normally free for relative movement, andmeans for periodically limiting the relative movement of said grinderand said slide.

7. A glass cutting mechanism of the character described comprising achuck, a grinder, means for alternately mioving the grinder into and outof engagement with an article to be operated upon, a feeler memberreciprocated to and from said article by corresponding movements of thegrinder, said feeler member and said grinder being connected to haverelative movement at all times, and adjustable means for variablylimiting said relative movement.

8. An improvement in glass cutting mechanism comprising a chuck, agrinder,

cutter-carrying slides supporting the rinder and movable toward and fromthe chuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grinder carrying slides, and meansfor limiting the relative movement of the grinder carrying slides andthe feeler slide.

9. An improvement in glass cutting mechanism comprising a chuck, agrinder, slides supporting the grinder and movable toward and from thechuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grinder carrying slides, and meansfor ad justably varying the relative movement of the grinder carryingslides and the feeler slides.

10. An improvement in glass cutting mechanism comprising a chuck, agrinder, slides supporting the grinder and movable toward and from thechuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grinder carrying slides, a lugprojecting from one face of the feeler slide, and an abutment on onegrinder slide positioned to engage said lug to limit relative movementof the grinder-carrying slides and the feeler slide.

11. An improvement in glass cutting mechanism comprising a chuck, agrinder, slides supporting the grinder and movable toward and from thechuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grinder-carrying slides, a lugprojecting from one face of the feeler slide, and a threaded rod carriedby one grinder slide and positioned to engage said'lug to adjustablylimit relative movement of the grindercarrying slides and the feelerslide.

12. An improvement in glass cutting mechanism comprising a chuck, agrinder, slides supporting the grinder and movable toward and from thechuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grindercarrying slides, means forperiodically looking the feeler slide, and means for limiting relativemovement of the grinder-carrying slides and feeler slides.

' 13. An improvement in glass cutting mechanism comprising a chuck, agrinder, slides supporting the grinder and movable toward and from thechuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grinder-carrying slides, a lockingblock, means for causing said locking block to periodically engage saidfeeler slide, and means for limiting the relative movement of thegrinder-carrying slides and the feeler slide.

14. An improvement in glass cutting mechanism comprising a chuck, agrinder, slides supporting the grinder and movable toward and from thechuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grinder carrying slides, a lockingblock for said feeler slide, an eccentric for actuating said lockingblock, and means for limiting relative movement of the grinder-carryingslides and the feeler slide.

15. An improvement in glass cutting mechanism comprising a chuck, agrinder, slides supporting the grinder and movable toward and from thechuck, a feeler slide for contacting with an article carried by saidchuck, and movable relative to the grinder-carrying slide, a lockingblock for said feeler slide, an eccentric engaging said locking block toactuate the same, an actuator for said eccentric, a cam for periodicallyoperating said actuator, and means for limiting ,relative movement ofthe grinder-carrying slides and the feeler slides.

16. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder-into and out of engagement with anarticle carried by said chuck, a feeler slide for contacting with anarticle carried by said chuck,'whereby said slide may be variablypositioned in accordance with the size of. said article, means wherebymovement of .the grinder toward said chuck is limited by said slide, andmeans for limiting movement of the feeler slide away from said chuck. V

17..An improvement in glass. cutting mechanism comprising a chuck, agrinder, means for moving the cutter into and out of engagement with anarticle carried by said chuck, a feeler slide for contacting withanarticle carried by said chuck, whereby said slide may be variablypositioned in accordance with the size of said article, means wherebymovement of the grinder toward said chuck is limited by said slide, andan adjustable abutment for variably limiting movement of the feelerslide away from said chuck.

18. An improvement in glass cutting mechanism comprising a chuck, a rockshaft, grinding mechanism connected with the rock shaft and movablethereby toward and. from the chuck, means for actuating the rock shaft,and means positioned to contact with the article and controlled by thevariations in the surface inequalities of the article carried by saidchuck to variably limit successive movements of the grinding mechanismtoward said chuck.

19. An improvement in glass cutting mechanism comprising a chuck, a rockshaft having a predetermined arc of oscillation, grinding mechanismconnected with the rock shaft and movable thereby toward and from saidchuck, means for actuating the rock shaft, means controlled by the sizeof the article carried by said chuck to limit movement of the grindingmechanism toward the chuck, and relief means for permitting the rockshaft to complete its arc of oscillation when movement of the grindingmechanism toward the chuck is arrested.

20. An improvement in glass cutting mechanism comprising a chuck, a rockshaft, grinding mechanism, arms carried by said rock shaft, a secondrock shaft in said arms, means connecting said second rock shaft withrespect to the grinding mech anism to permit independent movement of thegrinding mechanism with respect to the chuck, and means positioned tocontact with the articleand controlled by the variations in the surfaceinequalities of the article carried bysaid chuck to limit movement ofthe grinding mechanism toward the'chuck.

,-21. 'An improvement in glass cutting mechanism comprising a chuck, arock shaft, grinding mechanism, arms carried, b said rock shaft, asecond rock shaft carried by said arms, means connecting said secondrock shaft with the grinding mechanism to permit independent movement ofthe grinding mechanism with respect to the chuck, means whereby said.second rock shaft may be manually actuated, and means controlled by thesize or the article carried by said chuck to limit movement of thegrinding mechanism toward the chuck.

22. An improvement in glass cutting mechanism comprising a chuck, a rockshaft, grind-er carrying slides, arms carried by said rock shaft, asecond rock shaft mounted in said arms, slidable blocks in said slidesconnected with the second rock shaft, and means controlled by the sizeof the article carried by the chuck to limit movement of thegrinder-carrying slides toward the chuck.

23. An improvement in glass cutting mechanism comprising a chuck, a rockshaft, grinding mechanism connected with the rock shaft and movablethereby toward and from the chuck, a rotatable cam, an arm connectedwith the rock shaft and engaging said cam, and means controlled by thesize of the article carried by said chuck to limit movement of thegrinding .mechanism toward said chuck.

24. An improvement in glass cutting mechanism comprising a chuck, a rockshaft, grinding mechanism connected with the rock shaft and movablethereby toward and from the chuck, a rotatable cam, an arm connectedwith the rock shaft and engaging said cam, means controlled by the sizeof the article on said chuck for limiting movement of the grindingmechanism toward the chuck, and relief mechanism for permitting said armto move with said cam after movement of the grinding mechanism towardthe chuck is arrested. I

25. An improvement in glass cutting mechanism comprising a chuck, a rockshaft, grindingmechanism connected with the rock shaftand movablethereby toward and from the chuck, a rotatable cam, an arm connectedwith the rock shaft and engaging said cam, means controlled by the sizeof the article on said chuck for limiting movement of the grindingmechanism toward the chuck, and friction device connecting said arm withsaid rock shaft to permit said arm to move with the cam after movementof the grinding mecha iism toward the chuck is arrested.

26. An improvement in glass cutting mechanism comprising a chuck, a rockshaft, grinding mechanism connected with the rock shaft and movablethereby toward and from the chuck, a cam arm engaging said cam andprovided with friction member, a comple mental friction member carriedby said rock shaft, and means controlled by the size of the article onsaid chuck for limiting movement of the grinding mechanism toward thechuck.

27. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder into and out of engagement with anarticle carried by the chuck, means controlled by variations in thedimensions of said article for limiting movement of the grinder towardthe chuck, and means for preventing the grinder from moving away fromthe chuck a distance greater than the distance traversed by it whenmoving toward the chuck.

28. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder into and out of engagement with anarticle carried by said chuck, a feeler slide for contacting with anarticle carried by said chuck, whereby said slide may be variablypositioned in accordance with the size of the article. means wherebymovement of the grinder towarl said chuck is limited by said slide, andmeans for preventing the grinder from moving away from the chuck adistance greater than the distance traversed by it when moving towardthe chuck.

29. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder toward and from the work, meansfor variably limiting movement of the grinder toward the work inaccordance with inequalities in the surface of the work, and means forpreventing the grinder from moving away from the work a distance greaterthan the distance traversed by itwhen moving toward the chuck in makingeach individual cut.

30. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder to move the same intoand out of engagement with an article carried by the chuck, means forperiodically actuating said rock shaft, means for variably limitingmovement of the grinder toward said chuck in accordance withinequalities in the size of said article, and means for preventing thegrinder from moving away from the chuck a distance greater than thedistance traversed by it when moving toward the chuck in making eachindividual cut.

31. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder and having apredetermined arc of oscillation to move the grinder toward and from thechuck, means for variably limiting move ment of the grinder toward thechuck in accordance with inequalities in the article carried by saidchuck, means for preventing the grinder from moving away from the chucka distance greater than the distance traversed by it when moving towardthe chuck, and relief means for permitting the rock shaft to completeits arc of oscillation when movement of the grinder away from the chuckis arrested.

32. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder to move the same towardand from the chuck, means for periodically actuating said rock shaft,means for variably limiting movement of the grinder toward said chuck inaccordance with inequalities in the size of an article carried by saidchuck, an arm attached to said rock shaft, and means cooperating withsaid arm to limit movement of the grinder away from said chuck.

33. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder to move the same towardand from the chuck, means for periodically actuating said rock shaft,means for variably limiting movement of the grinder toward said chuck inaccord ance with inequalities in the size of an article carried by saidchuck, an arm connected with said rock shaft, and a variable abutmentpositionedto cooperate with said arm to limit movement of the grinderaway from said chuck.

34:. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder to move the same towardand from the chuck, means for periodically actuating said rock shaft,means for variably limiting movement of the grinder toward said chuck inaccordance with inequalities in the size of an article carried by saidchuck, an arm connected with said rock shaft, and provided with avariable abutment, and a wedgeshaped abutment positioned to cooperatewith said variable abutment to variably limit movement of the grinderaway from said chuck.

35. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder to move the same towardand from the chuck,

means for periodically actuating said rock,

shaft, means for variably limiting movement of the grinder toward saidchuck in accordance with inequalities in the size of an article carriedby said chuck, an arm connected with said rock shaft and provided with avariable abutment, a pivoted member having a wedge-shaped abutmentpositioned to cooperate with said variable abutment to variably limitmovement of the grinder away from said chuck, and means for controllingmovement of said abutment.

36. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder to move the same towardand from the chuck,

. rock shaft connected with the grinder to move the same toward and fromthe chuck, means for periodically actuating said rock shaft, means forvariably limiting movement of the grinder toward said chuck inaccordance with inequalities in the size of an article carried by thechuck, an arm carried by the rock shaft, and a pivotally supportedwedge-shaped abutment positioned to move by gravity transversely of saidarm as the arm moves with the rock shaft during movement of the grindertoward said chuck.

38. An improvement in glass cutting mechanism-comprising a chuck, agrinder, a rock shaft connected with the grinder to move the same towardand from the chuck, means for periodically actuating said rock shaft,means for variably limiting movement of the grinder toward said chuck inaccordance with inequalities in the size of an article carried by thechuck, an arm connected with the rock shaft, a pivotally supportedvwedge-shaped abutment pos tioned to move by gravity transversely of saidarm as the arm moves with the rock shaft during movement of the grindertoward said chuck and an actuator for reversing movement 0 saidabutment.

39. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder toward and from the chuck, meansfor variably limiting movement of the grinder toward saidchuck inaccordance with inequalities in the size of an article carried by saidchuck, and a variable abutment for preventing the grinder from movingaway from the chuck a distance greater than the distance Y traversed byit when moving toward the chuck.

40. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder-toward and from the chuck, meansfor variably limiting movement of the grinder toward said chuck inaccordance with inequalities in the size of an article carried by thechuck, a wedge-- shaped abutment, means cooperatingwith said abutmentfor preventing the grinder from moving away from the chuck a distancegreater than the distance traversed by it when moving toward the chuck,and means for controlling movement of said abutment.

41. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder toward and fromthe chuck, meansfor variably limiting movement of the grinder toward said chuck inaccordance with inequalities in the size of an article carried by thechuck,.a gravity operated variable abutment, means cooperating with saidabutment for preventing the means cooperating with said arm to preventthe grinder from moving away from the chuck a distance greater than thedistance traversedby it when moving toward the chuck, and means foreffecting a variable engagement between said arm and said rock shaft.

43. An improvement in glass cutting mechanism comprising a chuck, agrinder, a rock shaft connected with the grinder and having apredetermined arc of oscillation to move the grinder toward and from thechuck, means for variably limiting movement of the grinder toward thechuck in accordance with inequalities in the article carried by saidchuck, an arm for operating said rock shaft, means cooperating with saidarm to prevent the grinder from moving away from the chuck a distance,greater than the distance traversed by it when moving toward the chuck,and complemental friction devices connecting said arm and said rockshaft.

44. An improvement in glass cutting mechanism comprising a chuck,agrinder, a rock shaft, an arm having africtional engagement with saidrock shaft and connected with said grinder, saidgrinder being movabletoward and from the chuck, means for variably limiting movement of thegrinder toward the chuck in accordance with inequalities in the articlecarried by said chuck, an extension for said arm, and means co operatingwith said extension to prevent the grinder from moving away from thechuck a distance greater than the distance traversed by it when movingtoward the chuck.

45. An improvement in glass cutting mechanism comprising a chuck, agrinder, an arm for moving said grinder toward and from said chuck, saidarm having an extension, means for variably limiting movement of thegrinder toward the chuck in accordextension to prevent the grinder frommoving from the chuck a distance greater than the distance traversed byit when moving toward the chuck, and means for periodically actuatingsaid arm.

46. An improvement in glass cutting mechanism comprising a chuck, agrinder, a cam, a cam arm engaging said cam, a relief connection betweenthe cam arm and the grinder, means for variably limiting movement of thegrinder toward the chuck in accordance with inequalities in the articlecarried by the chuck, and means for preventing the grinder from movingaway from the chuck a distance greater than the distance traversed by itwhen moving toward the chuck.

47. An improvement in lass cutting mechanism comprising a chuck, agrinder, means for moving the grinder toward and from the chuck, an armconnected with the grinder-moving means, means for variably limitingmovement of the grinder toward the chuck in accordance with inequalitiesin the size of an article carried by the chuck, a yieldable abutmentcarried by said arm, and means for engaging said abutment to limitmovement of the grinder away from said chuck.

48. An improvement in glass cutting mechanism comprising a chuck, a

grinder,

" means for moving the grinder toward and from the chuck, an armconnected with the grinder-moving means, means for variably limitingmovement of the grinder-toward the chuck in accordance with inequalitiesin the size of an article carried by the chuck, a yieldable abutmentcarried by said arm, and a variable abutment positioned to engage saidyieldable abutment to limit movement of. the grinder away from saidchuck.

49. An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder toward and from the chuck, an armconnected with the grinder-moving means, means for variably limitingmovement of the grinder toward the chuck in accordance with inequalitiesin the size of an article carried by the chuck, a yieldable abutmentcarried by said arm, a pivoted member having a wedgeshaped abutmentpositioned to engage said yieldable abutment to variably limit movementof the grinder away from the chuck, and means for controlling movementof said wedge-shaped abutment.

50. An improvement in glass cutting mechanism comprising a chuck, agrinder,

means for moving the grinder toward and from the chuck, an arm connectedwith the grinder-moving means, means for variably limiting movement ofthe grinder toward the chuck in accordance with inequalities in the sizeof an article carried bythe chuck, a yieldable abutment carried bysaidarm, and a pivotally supported wedge-shaped abut-ment positioned tomove by gravity transversely of said yieldable abutment dur ingmovementof the grinder toward said chuck.

51- An improvement in glass cutting mechanism comprising a chuck, agrinder, means for moving the grinder toward and from the chuck, anarmconnected with the grinder-moving means, means for variably limitingmovement of the grinder toward the chuck in accordance with inequalitiesin the size of an article carried by the chuck, a yieldable abutmentcarried by said arm, a pivota'lly supported wedge-shaped abutmentpositioned to move by gravity transversely of said arm as the grindermoves toward said chuck, and an actuator for reversing the movement ofsaid wedge-shaped abutment.

52. An improvement in glass cutti mechanism comprising a chuck, agrinder, means for moving the grinder toward and from the chuck, an armconnected with the grinder moving means, means for variably limitingmovement of the grinder toward the chuck in accordance with inequalitiesin the size of an article carried by the chuck,

a spring pressed pin mountedvin said arm and having abutment shoulders,and means for variably engaging said pin to limit movement of thegrinder away from said chuck,

53. An improvement in lass cutting mechanism comprising a chuck, agrinder, means for moving the grinder into and out of engagement with anarticle carried by the chuck, means for rotating the chuck, and

pattern controlled means for imparting a longitudinal movement to saidchuck.

54. An improvement in glass cutting mechanism comprising a rotatablechuck, a grinder, means for moving the grinder into and out ofengagement with an article carried by the chuck, means normally actingto impart longitudinal movement to the chuck, and pattern means forregulating said longitudinal movement.

55. An improvement in glass cutting mechanism comprising a springpressed chuck shaft having a flange, a cutter, means for moving thecutter into and out of engagement with an articlesupported by said chuckshaft, pattern means engaging said flange to limit movement of saidshaft under the action of itsspring, and automatic means for disengagingsaid pattern means from said flange.

' 56. An improvement in glass cutting mechanism comprising a rotatablechuck, a grinder, means for moving the grinder into and out ofengagement with an article carried by the chuck, means normally actingto impart longitudinal movement to the chuck, a pattern membercontrolling said longitudinal movement, and means for automaticallyadjusting said pattern member to permit limited longitudinal movement ofsaid chuck.

57. An improvement in glass cutting mechanism comprising a rotatablechuck provided with a flange, a grinder, means for moving the grinderinto and out of engagement with an article carried by the chuck, meansnormally acting to impart longitudinal movement to the chuck, a patternmember engaging said flange to limit said longitudinal movement, andmeans for automatically adjusting said attern member to permit limitedlongitudlnal movement of said chuck.

58. An improvement in glass cutting mechanism comprising a rotatablechuck provided with a flange, a grinder, means for moving the grinderinto and out of engagement with an article carried by the chuck, meansnormally acting to impart longitudinal movement to said chuck, a

yieldable pattern member engaging said flange to limit said longitudinalmovement, and a cam on said flange for periodically adjusting saidpattern member to permit limited longitudinal movement of said chuck. Vc

59. An improvement in glass cutting mechanism comprising a rotatablechuck, a grinder, means for moving the grinder into and out ofengagement with an article carried by the chuck, a flange connected withsaid chuck, means normally acting to impart longitudinal movement tosaid chuck, a pattern member provided withv a plurality of shoulderspositioned to engage said flange to limit said longitudinal movement,and means for periodically moving the pattern member to permit saidflange to successively engage said shoulders. V

60. An improvement in glass cutting mechanism comprising a rotatablechuck, a grinder, means for moving the grinder into and out ofengagement with an article carried by the chuck, and means controlled byj the operation of the chuck, and means for automatically stopping themachine when the pattern on said article has been completed.

62. An improvement in glass cutting mechanism comprising a rotatablechuck, a grinder, means for moving the grinder into and outof'engagement with an article car- 'ried by the chuck, a flangeconnected with ,to permit said flange to successively engage saidshoulders, and means for automatically stopping the machine at the endof one completerevolution after the flange is engaged withthelast'shoulder.

.63. An improvement in glass cutting mechanism comprising a drive shaft,a rotatable chuck, means operated by said drive shaft for actuating saidchuck, means normally acting to impart longitudinal movement to thechuck, a throw-off member controlling the application of power to saiddrive shaft, and a throw-off pawl connected with the chuck and normallyout of register with said throw-oil member, said pawl being positionedto be brought into en agement with the throw-off member as the c luckmoves longitudinally. i

64. An improvement in. glass cutting mechanism comprising'spaced apartgrinders mounted on parallel axes, and a chuck positioned between saidcutters, on an axis extending in the same general direction, theaxis ofthe chuck being at an angle with respect to the axes of the grinders.

65. An improvement in glass cutting mechanism comprising spaced apartgrinders mounted on parallel horizontal axes, and a chuck locatedbetween the grinders and mounted on an inclined axis extending in thesame general direction.

66. An improvement in glass cutting mechanism comprising spaced apartgrinders mounted on parallel axes, a chuck positioned between saidgrinders, the axis of the chuck being at an angle Withrespect to theaxes of the grinders, and means whereby the grinders may be adjusted inlines parallel with their axes.

67. An improvement in glass cutting mechanism comprising a frame, spacedapart grinder slides, grinders in said slides mount ed on parallel axes,a chuck between the grinders, the axis of the chuck being at an anglewith respect to the axes of the grinders, means for moving the grinderslides toward and from the chuck, and meanswhereby the grinder slidesmay be adjusted for-- ward and rearwardly on said frame.

68. An improvement in glass cutting mechanism comprising a frame, spacedapart boxes, spaced apart grinders mounted in said boxes on parallelaxes, a chuck between the grinders, the axis of the chuck being at anangle with respect to the axesof the grinders, and means whereby saidboxes may be adjusted forwardly and rearwardly in said frame; 7

69. Glass cutting mechanism comprising spaced apart grinders mounted onaxes disposed in a common plane, and a; chuck located between: saidgrinders and mountec on an axis inclined with respect to sald plane; I

70. Glass cutting mechanism comprising a chuck, and two'rotatablegrinding; discs each having an axisinclined with respect to the axis ofsaid chuck and arranged to simultaneously cut decorative figurements-ofdifferent angularity on an article carried by saidchuck, said grindingdisks being mounted in positions-.whiclr are normally fixed with:relation to the position of' the chuck.

71. Glass-cutting mechanism comprising a chuck, two grinders, and'meansfor sup,- porting said grinders in position to simultaneously cutdecorative figurements of different angularity on an article carried bysaid chuck, said grinder supporting means being'in normallyfixed-positions relative to the position ofsaid chuck.

72. Glass cutting mechanism comprising a rotatable work holder, aplurality of grinders for operating'on an articleto be cut, and meansfor supporting each of said grindersfor movement upon a surface of thearticle at an angle with respect to the line of movement of the othergrinder upon said surface, said grinding disks being mounted inpositions which are normally fixed with relation to the position of thechuck.

7 3-. Glass cutting mechanism comprising a work holder for an article tobe cut, and means" for simultaneously cutting figurements of differentangularity with respect to a line disposed circumferentially of thearticle, said cutting meansbeing supported in positions which arenormally fixed with relation to the position of the work holder.

74. Glass cutting mechanism comprising a shaft rotatable about a fixedaxis, a chuck carried by said sha ft,.a locking wheel secured to saidshaft, a locking device for said wheel, a ratchet wheel secured to theshaft, a pawl co-operating with said ratchet wheel to rotate the shaft,means for actuating saidpawl, and means controlled by said lastnamedmeans for releasing said locking device. I

75. Glass cutting mechanism comprising a shaftrotatable abouta fixedaxis, a chuck carried by said shaft, a locking wheel sccured to saidshaft, a locking device for said wheel, a ratchet wheel secured to theshaft, -a pawl co-operating with said ratchet wheel to rotate the shaft,means for actuatingsaid-pawl, and means for simultaneously releasingsaidlocking-device and actuating'said, pawl. I

76. Glass cutting mechanism comprising ashaft rotatable about a fixedaxis, an ex pansible chuck carried by said shaft, an opcrating memberfor said chuck, a member slidable axially of said shaft and rotatabletherewith for controlling expansion and contractionof sai-d chuck and anactuating device for said. operating member h'aving rotatable connectiontherewith. V I

77. A grinding machine: comprising a frame, a rotatable chuck forgripping the article being cut mounted therein, means for causingstep-by-step rotation of the chuck, a slidable block mounted in theframe movable towards and from the chuck, a rotatablesha-ft journaled inthe block, a grinder mounted on the shaft and adapted to contact withsaid article, and means for moving said block to cause the grinder tocontact with the article during the periods that the chuck is at restand to maintain it out of contact during rotation thereof.

78. A grinding machine comprising a frame, a rotatable chuck mountedthere-in, a block slidable towards and from the chuck, a shaft journaledin the block and having a grinder iixedthereto, a bell crank leverpivoted in the frame, one arm of which has an operative engagement withthe said block for actuating the same, and the other arm of which isresiliently urged in a direction to permit the block to cause thegrinder to contact the article being cut, and means for intermittentlymoving the second named arm in the opposite direction to causeseparationof the grinder and said article. I

79. A grinding machine comprising a frame, a rotatable chuck mountedtherein, a block slidable towards and from the chuck, a shaft j ournaledin the block and havinv a grinder fixed thereto, a bell crank lever pivoted in the frame, one arm of which has an operative engagement withsaid block, for actuating-the same, and the other arm of which is urgedin a direction to permit the block to cause the grinder to contact'thearticle being cut, and'means for moving the second named arm in theopposite direction to'cause separation of said grinder and article, thetwo arms of the bell crank being connected by a lost motion connection.

80. A grinding machine comprising. a frame, a chuck for gripping thearticle be-' ing cut mounted therein, and having a stepby-step rotation,a slidable block, a cutter shaft j'ournaledtherein, a rock shaft uponsaid frame, a connection between said rock shaft and block to move thecutter shaft toward and from the chuck, and means for 0s cillating saidrock shaft in predetermined relation to said step-by-step rotation.

81. A grinding machine. comprising a frame, a chuck, a rock shaftmounted in the frame, grinding mechanism mo-vabletoward and fromthechuck, an arm fixed to. the. rock shaft and connected to the'grindingmechanism formoving the same, resilient means

